#include<string>
#include<iostream>
using std::cin;
using std::cout;
using std::endl;
using std::string;
int main()
{
    string str="hello";
    string phase="hello world";
    string slang="hiya";
    string st1(10,'c'),st2;
    st2=st1;
    string s3=str+phase;
    cout<<str<<endl;
    cout<<s3<<endl;
    cout<<slang<<endl;
    cout<<st2<<endl;
    return 0;
}